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‘84 Spider 2.0
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Discussion Starter · #1 ·
I am browsing the internet for a carburetor rebuild kit for my 84 EU Spider 2.0, equipped with Solex carbs.
I found the text on the car Solex 40.ADDHE and a small aluminium label says "1154804 01100".
In the webshops there are 2 different gasket kits offered, one for "Solex 40ADDHE 20/24/29", the other is for "Solex 40ADDHE 32".

On the pictures I found only one difference: the small copper pin in the middle of the membrane has a "mushroom" shape, the other one has a slot,

How can I tell which one I need for my carbs? I don't want to disassemble the carbs until I don't have the membranes at hand, and of course I dont want to order the false ones (posting abroad is time + money...)

Question #2: can the trumpets offered for Weber DCOE40 mounted on these Solex 40s too? I love the raw noise of the suction which is now damped by the air filter.

Thanks for your help in advance.

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‘84 Spider 2.0
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Discussion Starter · #3 ·
You missed one other difference between the 2 different diaphragms: the Solid (mushroom-shaped) Cam diaphragm has 8 holes while the Slotted Cam diaphragm has 6 holes. Use a mirror on a telescoping handle to look at the accelerator pump cover on the underside of your carbs and count the number of screws in the pump cover: 6 or 8. With a very strong light, you may even be able to see whether you have the solid or slotted cam under the end of the pump lever that is in the middle of the pump cover. I know for sure that model 27 and 32's 40ADDHE's were used on Alfettas but I do not know if they were used on Spiders.
And yes the horns for Webers and Dellortos will fit your Solexes, as long as they are for 40s and not for 45s/48s. View attachment 1759493 View attachment 1759494
Yes, I have seen the different hole pattern. I tried to find pictures of bottom side of these carbs on the internet, I have seen 2 variants but both had 6 screws.
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Mine looks like the upper variant and if in the middle of the cover that is actually the pin, than yes, I have the slotted version. Thank you for the hint, also regarding the trumpets. On my car there is a support rod, connects the air intake box to the engine mount. If mounted, it holds the weight of the airfilter, the airbox and partially the 2 carbs as well. If I use trumpets instead of airfilter, than these rod can not be connected. Do you think there is another connection option, or trumpets = carbs hanging on the rubber mounts only? Or trumpets requiring solid carb mounts instead of rubbers?
 

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‘84 Spider 2.0
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Discussion Starter · #5 ·

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142 Posts
Discussion Starter · #7 ·
My car came with Solex 40ADDHE/20's but I have kept the very efficient factory air filter. There is a balance here to consider: love of that induction roar versus increased internal engine wear. If you are driving your car on the street with the horns, it would be best to have some sort of filter system (there are many options available ) .
“Street with the horns”? Im afraid i dont understand it.
However, my Spider is not a daily driver, i drive it on paved Roads, mainly in Hungary, maybe a little on the neighbouring countries’ mountain roads. I know air filter is accidentally there, but considering some wear over a decade vs the sound of open throttles’ roar… not an easy decision.
 
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